POLTPETALOUS EXOGENOUS PLANTS. 201 



cottony pubescence, as is also the fruit and leaf-stems 

 and the younger branches; slightly crenately toothed or 

 entire, teeth mucronate ; berries large ; bluish-black or 

 green with a purple shade. It makes an excellent wine, 

 but is little esteemed for eating on account of an acrid 

 juice beneath the skin, which, if swallowed, gives a burning 

 pain in the throat. Mustang Grape, Fruit ripens in July 

 and August. 



V. VULPINA, Michx. {Muscadine.) Ze«ve5 broadly cor- 

 date, toothed-serrate, smooth and glossy on both sides, or 

 rarely like the brandies pubescent, the sinus at the base 

 broad and rounded, or narrow and acute; panicle small, 

 berry-like; stem climbing high, with pale and smooth bark. 

 Leaves 2'-3' wide. Berry J'-f in diameter, purple, pleas- 

 ant flavored. 



V. RUPESTRis, Scheele. Leaves cordate, smooth on 

 botli sides, unequally toothed, teeth submucronate, entire; 

 plant smooth ; racemes small, often not shouldered ; berries 

 black or greenish purple, small, about f of an inch in 

 diameter; seeds 3-4, large. On the banks of streams. 

 This grape often grows in thick cane-like patches, and 

 does not climb ; but on hills and uplands it climbs to the 

 heigiit of 8 to 15 feet. Associated with the Mountain 

 Grape in the region northwest of Austin. Its smooth 

 leaves, of a different shade of green, etc., enable any one at 

 a glance to distinguish it from the Mountain Grape. 



AMPELOPSIS, Michx. 



Petals distinct, spreading, concave; dish none; leaves 

 digitate ; fioivers clustered in corymboso panicles. 



A. QUINQUEFOLIA. (American Ivy,) Leaflets 5, oblong- 

 obovate, serrate above the middle, smooth; berry small, 

 dark blue. 



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